Typewriter



' May 11 ,1926.

C. U. CARPENTER ET AL TYPEWRITER Filed Jan. 28 1924 2 Sheets-Sheet 1 Cmiuss U'Onkpmrm,

RUDOLPH FfBmmur,

May 11 ,1926. 1,584,008

C. U. CARPENTER ET AL TYPEWRITER Filed Jan. 1924 2 Sheets-Sheet 2 I g'vwzntws, CHARLES U. CARPENTER, Ruoqd. PH E BRANDT,

Patented May 11, 1926.

UNITED stares raters smear orricu.

CHARLES U. CARPENTER AND RUDOLPH F. BRANDT, OF DAYTON, OHIO, ASSIGNORS 'IO DAYTON PORTABLE TYPEWRITER COMPANY, OF DAYTON, OHIO, A CORPORATION OF DELAWARE.

Application filed January 28, 1924.

Our invention relates to typewriters.

It is the object of our invention to provide mechanism for imparting to a universal bar uniform movement at substantially the same rate over the same distance in the same time by any one of a plurality of keys, no matter what the elevation or location of the key which actuates the universal bar common to all the keys. v

It is a further object of our invention to provide asingle step bar to align the key faces in the respective banks of keys.

It is :1 further object of our invention to provide such an arrangement of parts and mechanism, preferably in a four-bank machine,- with keys arranged in different heights and of different lengths.

It is a further object of our invention to provide a universal bar in such a combination which consists of an easily manufactured straight rod.

It is an additional object of our invention to provide keys arranged so as to clear one another in their operation, and still preserve the four-bank arrangement.

It is an additional object to provide for such a movement through such a mechanism utilizing the same length of depression for each key- Referring to the drawings:

Figure 1 is a side elevation of a key in the top bank, showing in section the uni-v versal bar, the supporting shaft of the key, and the stop.

Figure 2 is a similar view of the key in the secondbank.

Figure 3 is a similar view of a typical key in the third bank, showing in section the shaft which supports the keys of the first two banks.

Figure 4 is a view similar to Figure 3, showing a typical key in the lowest bank of keys.

Figure 5 is a side elevation of the typical keys from the four banks suspended on their respective shafts, and arranged with respect to the common stop and the common uni versal bar.

Referring to the drawings in detail:

1 is a shaft arranged transversely of a typical typewriting machine, upon which is suspended a key lever having a downwardly and forwardly extended portion 2, a horizontally and forwardly extending portion Serial No. 689,028.

3, and an upwardly extending portion 4, terminating in the surface upon which the designation of the keyappears as at Returning to the shaft 1, it will be observed that the key passes downwardly as at 6. (in one side of this downward projection' is a cam 7 engaging with the universal bar 8. On the other side of this downwardly projecting portion 6 it engages with the transverse shaft 9 constituting the common stop for the several keys. At the bottom of the projection 6 is a finger 10 having eyes 11 and 12 for the attachn'ient of the links, not shown, connected with the type bars. The keys shown. in Figures 1 and 2 are substantially the same, with the exception of the extension of the portion marked 3 and the lowering of the portion marked 43. The cam is also modified as at 7*, and the finger lengthened and somewhat changed .in direction as at 10.

The key lever shown in Figure 3 is mounted on the shaft 14, and is suspended therefrom by the downwardly extending arm 15- This arm is forwardly extended in a substantially horizontal plane as at 16, downwardly as at 17, and forwardly again as at 18 when it is elevated, as at 19, terminating in the surface 20. This key lever is extended rearwardly in a semi-circular portion marked 21, which terminates in a cam 22, the forward end of which engages with the universal bar 8 and the rear with the stop 9. The finger 23 is connected to the base of the cam for carrying the usual links.

The key lever shown in Figure 4 is similar to that shown in Figure 3, save in dimensions, which. are necessarily modified because of the location of this key lever.

By referring to Figure 5, it will be seen that this is .a four-bank machine in which each one of the keys may move freely with respect to the other in the four-bank arrange ment. The keys are arranged in two groups on the two shafts 1 and 14;. We notice that the depression of any one key nine-sixteenths (9 of an inch, the preferable depression of such a key, will result in the movement of the straight universal bar 8 the same distance, no matter which key is depressed. It will also take the same time for a given impulse in the key to travel the predetermined dis tance. After thus actuating the universal baly tlie key returns to the universal stop,

which lines up the keys and key faces, as well as the type faces.

The arrangement of the cams carried by the key levers permits of a ready adjustment of the movements of the several keys to impart this same moven'ient to the same universal bar.

Consequently, it is possible to secure a uniform movement in the machine properly synchronized and timed with the n'lovements of the type bars and their faces.

It will be understood that we desire to comprehend within our invention such modications as may be fairly embraced within it, and as may be found necessary in adapting it to various conditions in the art in the course of the application of the invention.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, is:

1. In a typewriting machine, a key lever, a universal bar, a stop, and a substantially triangular shaped cam on said key lever adapted to engage with the universal bar to actuate it, said key lever beingadapted to be limited in its return movement by the stop, the portion of the key lever carrying the cam being adapted to extend between the stop and the universal bar..

2. In a typewriting machine, a key lever, a universal bar, a stop, anda substantially triangular shaped cam on said key lever adapted to engagewith the universal bar to actuate it, said key lever being adapted to be limited in its return movement by the stop, the portion of the key lever carrying the cam being adapted to extend between the stop and the universal bar, and means 011 said key lever for carryinga link to actuate a type bar.

3. In a typewriting machine, a plurality of key levers and keys arranged in banks, means of supporting said key levers, a substantially triangular shaped cam on each of said key levers, said cams being soarranged on each series of key levers that the same movement in the same time will be imparted to a common universal bar, a universal bar, a common stop for limiting all of said key levers to the same position when at rest, and means for pivotally supporting the respective series of key levers adjacent the top of the machine.

4:. In a typewriting machine a plurality of keys and key levers arranged in banks transversely located, pivotal supports arranged adjacent to one another for support ing the respective series of keys and key levers, one of said series of key levers consisting of an outwardly and inwardly extending portion suspended from a vertical portion and also consisting of a downwardly extending portion having a cam thereon, and the other series of keys consisting of an outwardly extending and downwardly ex tending portion, said latter portion having a cam thereon, a common stop for limiting the movement of said key levers in one di rection, and a common universal bar adapted to-be actuated the same distance during the same period by said cams on said key levers.

5. In a typewriting machine, a plurality of keys and key levers, a transversely located pivotal member for supporting one series of key levers, said key levers consist ing of a downwardly extending and forwardly extending and a rearwardly extending portion, said rearwardly extending portion carrying a cam with a finger projecting beneath, and a second transversely located pivotal member supporting the second series of keys, said second pivotal member being below and over the cams of the first-- mentioned portion of key levers, said second pivotal member supporting the upper series of keys and key levers, said key levers of.

the second series consisting of a downwardly and forwardly extending portion, the down.- wardly extending portions carrying cams and fingers adjacent the first-mentiond cams and fingers, a common stop for limiting the movement of the key levers in one direction, and a common actuator adapted to be act-uated by said cams. I i 6. The combination with a stop bar and universal bar of a typewriter, of akey lever pivoted to swing about a horizontal axis, a downwardly extending extension formed on the pivoted end of the key and having its lower end adapted to be pivotally connected with a type-carrying element, and a relatively wide V-shaped member formed with the extension and normally disposed between the stop and universal bars and permitting the usual actuation of the key lever without shifting the universal bar, the full depression of the key lever causing the V shaped member to actuate the universal bar.

In testimony whereof, we aflix our signatures.

CHARLES U. CARPENTER. RUDOLPH F. BRANDT.

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